With the development of light boxes' backlighting, LED strip lights are commonly used in advertising lighting, for its long lifespan, low energy consumption, and easy installation.
1. Long service life
Due to the high quality of SMD LEDs and advanced process, most of the LED strip lights have a life of up to 50,000 hours, and the light almost has no droop in the long period of working, which not only avoids the frequent replacement of backlighting but also meets the brightness demand of lightbox lighting.
2. Low energy consumption
The energy consumption of LED strips is only 20% of that of the traditional light tube, and the LED lighting has a better heat dissipation effect.
3. Easy installation
LED light strips are more convenient for installation than other light sources. For example, the LED curtain strip lights only need to hang on the top of the light box for fixation, which greatly saves the labor cost of installation.
SHENZHEN MLDR TECHNOLOGY CO., LTD. is a new developing enterprise committed to the designing, developing, manufacturing, and selling of LED light strips for advertising lighting, home lighting and decorative lighting.
2018年10月30日星期二
LED Strip 220V vs 12V
LED strips are often used to outline the contours of buildings, to build large lighting patterns, interior decorations, home lighting, and so on.
Classified according to the input voltage, the SMD LED strip lights can be divided into the high-voltage and the low-voltage. The input voltage of the low voltage light bar is commonly 12V or 24V DC, and the high-voltage light bar is 220V AC. So what are the differences between the two? What are the advantages and disadvantages of them? This post will give you the answer.
1. Safety performance: As we all know, the voltage of AC 220V is dangerous, which is not suitable for some places that people can easily touch. The low-voltage LED light bar works under the working voltage of DC 12V or 24V that is no danger to the person. To avoid hurting people, LED strip lights manufacturer will encapsulate the rigid strip with plastic profile and cover seal the flex LED tape with the plastic tube. Despite the improved safety performance, the cost of production has also increased.
2. Installation: The high voltage is used in daily life so that the installation of 220V LED strips is relatively simple. However, the 12 volt and 24 volt LED tapes are need corresponding LED adaptor to transfer the 220V AC to DC low voltage, which is relatively complicated during installation.
3. The price: The price of the LED lights themselves are close, but it is different from the overall cost. At current market prices, the cost of the low-voltage power supply accounts for a large share of the total cost. Therefore, the overall usage cost of low-voltage LED strips will be higher.
4. Service life: The lifespan of the low-voltage LED strips will be 50,000 hours. Using the same material, the high-voltage LED lights will have a higher working temperature and faster droop, which directly shorten the working life.
The above analysis shows that the two types of LED strip lights have their own advantages and disadvantages. We should choose the right product according to different usage environments and requirements.
Classified according to the input voltage, the SMD LED strip lights can be divided into the high-voltage and the low-voltage. The input voltage of the low voltage light bar is commonly 12V or 24V DC, and the high-voltage light bar is 220V AC. So what are the differences between the two? What are the advantages and disadvantages of them? This post will give you the answer.
1. Safety performance: As we all know, the voltage of AC 220V is dangerous, which is not suitable for some places that people can easily touch. The low-voltage LED light bar works under the working voltage of DC 12V or 24V that is no danger to the person. To avoid hurting people, LED strip lights manufacturer will encapsulate the rigid strip with plastic profile and cover seal the flex LED tape with the plastic tube. Despite the improved safety performance, the cost of production has also increased.
2. Installation: The high voltage is used in daily life so that the installation of 220V LED strips is relatively simple. However, the 12 volt and 24 volt LED tapes are need corresponding LED adaptor to transfer the 220V AC to DC low voltage, which is relatively complicated during installation.
3. The price: The price of the LED lights themselves are close, but it is different from the overall cost. At current market prices, the cost of the low-voltage power supply accounts for a large share of the total cost. Therefore, the overall usage cost of low-voltage LED strips will be higher.
4. Service life: The lifespan of the low-voltage LED strips will be 50,000 hours. Using the same material, the high-voltage LED lights will have a higher working temperature and faster droop, which directly shorten the working life.
The above analysis shows that the two types of LED strip lights have their own advantages and disadvantages. We should choose the right product according to different usage environments and requirements.
2018年10月18日星期四
LED heat dissipation technology and materials
Heat dissipation is a principal factor affecting the illumination intensity of LED lights. In order to achieve a better effect, all of the LED lights manufacturers and related research institutes have been working to improve the heat dissipation technology and materials.
In general, the heatsink can be divided into the passive heatsink and the active heatsink. Passive heat dissipation means that the heat of the LED light source is naturally radiated into the air through the heatsink, and the heat dissipation effect is proportional to the size of the heatsink. However, it can only be used in LED lights of relatively low power. For example, the aluminum PCB of the rigid LED light strip is equivalent to a heatsink. The high power LED lights such as the LED grow light commonly adopts active heat dissipation, that is, the heat emitted by the heat sink is forcibly taken away by the heatsink such as the fan, which is characterized by high cooling efficiency and the small volume.
As can be seen from the above table, silver and copper are the best thermal materials, followed by gold and aluminum. However, gold and silver are too expensive, so the current heat sink is mainly made of aluminum and copper. In comparison, both copper and aluminum alloy have their own advantages and disadvantages. Copper has good thermal conductivity, but the price is relatively expensive, the processing is difficult, the weight is too large, and the copper heat sink has a small heat capacity and is easily oxidized. On the other hand, pure aluminum is too soft to be used directly. The aluminum alloy used can provide sufficient hardness. The advantage of aluminum alloy is that it is cheap and light, but the thermal conductivity is much worse than copper. Of course, there are some radiators for other materials, such as fiberglass, ceramics, etc., and because of their price and process, they also have a place in the market.
The LED industry has extremely strict requirements on the alignment accuracy of the heat-dissipating substrate itself, and it needs to have characteristics such as high heat dissipation, small size, and good adhesion of metal lines. To improve LED luminous efficiency and service life, solving the heat dissipation problem of LED products is one of the most important issues at this stage.
In general, the heatsink can be divided into the passive heatsink and the active heatsink. Passive heat dissipation means that the heat of the LED light source is naturally radiated into the air through the heatsink, and the heat dissipation effect is proportional to the size of the heatsink. However, it can only be used in LED lights of relatively low power. For example, the aluminum PCB of the rigid LED light strip is equivalent to a heatsink. The high power LED lights such as the LED grow light commonly adopts active heat dissipation, that is, the heat emitted by the heat sink is forcibly taken away by the heatsink such as the fan, which is characterized by high cooling efficiency and the small volume.
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| Heat Conductivity Coefficient |
As can be seen from the above table, silver and copper are the best thermal materials, followed by gold and aluminum. However, gold and silver are too expensive, so the current heat sink is mainly made of aluminum and copper. In comparison, both copper and aluminum alloy have their own advantages and disadvantages. Copper has good thermal conductivity, but the price is relatively expensive, the processing is difficult, the weight is too large, and the copper heat sink has a small heat capacity and is easily oxidized. On the other hand, pure aluminum is too soft to be used directly. The aluminum alloy used can provide sufficient hardness. The advantage of aluminum alloy is that it is cheap and light, but the thermal conductivity is much worse than copper. Of course, there are some radiators for other materials, such as fiberglass, ceramics, etc., and because of their price and process, they also have a place in the market.
The LED industry has extremely strict requirements on the alignment accuracy of the heat-dissipating substrate itself, and it needs to have characteristics such as high heat dissipation, small size, and good adhesion of metal lines. To improve LED luminous efficiency and service life, solving the heat dissipation problem of LED products is one of the most important issues at this stage.
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